n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 170 |
5 | 1204 |
6 | 8736 |
7 | 64416 |
8 | 480480 |
9 | 3615040 |
10 | 27382784 |
11 | 208539136 |
12 | 1595216896 |
13 | 12247746560 |
14 | 94330470400 |
15 | 728474664960 |
16 | 5638832087040 |
17 | 43737154928640 |
18 | 339856038297600 |
19 | 2645063771750400 |
20 | 20615846154731520 |
21 | 160889637246074880 |
22 | 1257082279931412480 |
[0,1,4,25,170,1204,8736,64416,480480,3615040, 27382784,208539136,1595216896,12247746560, 94330470400,728474664960,5638832087040, 43737154928640,339856038297600,2645063771750400, 20615846154731520,160889637246074880, 1257082279931412480] |